Array index out of range?

OK, so I have a network script, everything works fine up to the point were a user joins a server, is asked for a password, then clicks connect. But when the user clicks connect i get and error Array index out of range. Here is the code:

 var gameName:String = ""; 
 var serverName:String = "";
 var showTextField:boolean;
 var showPassField:boolean;
 
 private var connect:boolean;
 private var canStart = false;
 private var fontStyle : GUIStyle;
 private var passWord:String = "";
 private var passAtemp:String = "";
 private var refreshing:boolean;
 private var hostData:HostData[];
 
 private var btnX:float;
 private var btnY:float;
 private var btnW:float;
 private var btnH:float;
 
 function Start(){
     btnX = Screen.width * 0.05;
     btnY = Screen.width * 0.05;
     btnW = Screen.width * 0.1;
     btnH = Screen.width * 0.1;
     }
 
 function startServer(){
     Network.incomingPassword = passWord;
     Network.InitializeServer(6, 25000, !Network.HavePublicAddress);
     MasterServer.RegisterHost(gameName, serverName, "test game");
     }
 
 
 function refreshHostList(){
     MasterServer.RequestHostList(gameName);
     refreshing = true;
 }
 
 function Update(){
     if(refreshing){
         if(MasterServer.PollHostList().Length > 0){    
             refreshing = false;
             Debug.Log(MasterServer.PollHostList().Length);
             hostData = MasterServer.PollHostList();
             }
         }
     }
 function OnServerInitialized(){
     Application.LoadLevel("Lobby");
     Debug.Log("Server Initialized");
     
     
 }
 function OnMasterServerEvent(mse:MasterServerEvent){
     if(mse == MasterServerEvent.RegistrationSucceeded){
         Debug.Log("Registared Server");
         }
     }
 
 
 function OnGUI(){
                 
     if(showPassField){    
         GUI.Label(Rect (btnX * 6, btnY * 4, btnW * 2, btnH * 0.5), "Enter server Password: ");
         passAtemp = GUI.TextField(Rect (btnX * 8, btnY * 4, btnW * 2, btnH * 0.2), passAtemp, 12);
     if(GUI.Button(Rect(btnX * 7, btnY * 5, btnW, btnH * 0.5), "Connect")){
         connect = true;
         Debug.Log("Pass");
     }
 }
     
     if(showTextField){
         GUI.Label(Rect (btnX * 6, btnY * 3, btnW * 2, btnH * 0.5), "Enter server name: ");
         serverName = GUI.TextField(Rect (btnX * 8, btnY * 3, btnW * 2, btnH * 0.2), serverName, 25);
         GUI.Label(Rect (btnX * 6, btnY * 4, btnW * 2, btnH * 0.5), "Enter server Password: ");
         passWord = GUI.TextField(Rect (btnX * 8, btnY * 4, btnW * 2, btnH * 0.2), passWord, 12);
         if(GUI.Button(Rect(btnX * 7, btnY * 5, btnW, btnH * 0.5), "Start")){
             startServer();
         }
         if(GUI.Button(Rect(btnX * 11, btnY * 5, btnW, btnH * 0.5), "Cancel")){
             Application.LoadLevel("Menu");
         }
     }
     
     if(!Network.isClient && !Network.isServer && !showTextField){
         
                 if(GUI.Button(Rect(btnX, btnY, btnW, btnH), "Start Server")){
                     showTextField = true;
                     Destroy(GameObject.FindWithTag("Menu"));
                     Debug.Log("Starting Server");
             }
 
     if(GUI.Button(Rect(btnX, btnY * 1.2 + btnH, btnW, btnH), "Refresh Host")){
             Debug.Log("Refreshing");
             refreshHostList();
         }
         
     if(GUI.Button(Rect(btnX, btnY * 3.4 + btnH, btnW, btnH), "Exit")){
             Application.Quit();
             }
             
     if(hostData){
         for(var i:int = 0; i<hostData.length; i++){
             if(GUI.Button(Rect(btnX * 2 + btnW, btnY*1.2 + (btnH * i), btnW * 3, btnH*.5),hostData[i].gameName + "" +hostData[i].connectedPlayers + "/6")){
                 showPassField = true;
                 Destroy(GameObject.FindWithTag("Menu"));
                 
                 }
             }
         if(connect){
             Network.Connect(hostData[i],passAtemp);
             }
         }
     }
 }